MailTester Ninja
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Email Checker and Finder

Our free email checker and email verifier tests any address in real time. Our email finder gets you the ones you are missing, and your sender reputation stays clean. Nothing is ever stored.

Verify a whole list

Last hour—Verified emails
Identifying—Bounces prevented for good
Impact—Saved CO₂ eq.

Trusted by Industry Leaders

Join thousands of companies worldwide who trust our email verification and email finder solutions!

Revolut Gartner Sotheby's EY Instantly Prove Taap.it osapiens

Rated 5/5 on Google

How Our Email Checker & Email Verifier Works

A simple 3-step process to verify emails with our email verification tool

$ verify name@company.com
syntax    well formed
dns       company.com found
mx        mx1.company.com
> EHLO happy.mailtester.ninja
< 250 mx1.company.com Hello
> MAIL FROM:<check@mailtester.ninja>
< 250 2.1.0 OK
> RCPT TO:<name@company.com>
< 250 2.1.5 OK
> QUIT          no email is ever sent
verdict   ok Accepted

  1. Enter Email Address

    Input the email address you want to verify using our email checker and email verification tool.

  2. Automatic Analysis

    Our email verifier performs comprehensive verification including syntax, domain, and deliverability checks.

  3. Detailed Results

    Get a complete report with confidence score and recommendations from our email verification tool.

Why Choose Our Email Verification Tool & Email Finder?

Our professional email verifier offers comprehensive verification and discovery to optimize your email marketing campaigns with advanced email checker capabilities.

Instant Email Verification

Verify the validity of any email address in real-time with our advanced email checker and email verifier technology.

Advanced Email Finder

Discover and locate valid email addresses for business contacts and lead generation with our powerful email finder tool.

Jane Doeacme.com

  1. jane.doe@acme.comRejected
  2. jdoe@acme.comFound

Anti-Spam Detection

Analyze spam scores and deliverability to optimize your marketing campaigns with our email verification tool.

Fast API Integration

Integrate our email verification and email finder capabilities into your applications with our RESTful API.

GET https://happy.mailtester.ninja/ninja?email=info@apple.com&key=YOUR_KEY

{ "code": "ok", "message": "Accepted" }

Analytics

Keep an instant report of all your email verifications and email finder results.

Valid
48%
Invalid
37%
Uncertain
15%

Last hour, worldwide. Your checks on this page: 0 valid, 0 invalid, 0 uncertain.

Syntax Validation

Verify the validity of any email address in real-time with our advanced email checker and email verifier technology.

Integrations

Use the verifier and the finder from the tools you already work in: Zapier, Make, n8n, Google Sheets, WordPress, Chrome, MCP and the REST API.

How to verify an Email Address

Watch this tutorial to learn how to effectively use our email checker and email finder

Media Mentions

"Email verification company MailTester.Ninja aims to provide a powerful industry alternative, emphasizing key qualities like affordability, precision, speed, accessibility, and human-focused support ..."

Hackernoon

"New businesses follow the same basic formula to launch their companies every day. That makes standing out against thousands of other tech companies feel like a roll of the dice ..."

Entrepreneur

“Accuracy is everything, we have built internal benchmarking tools to measure and improve results daily. Unlike some providers that inflate results or operate near scam territory, we encourage clients to compare our results head-to-head with competitors ...”

Business Enquirer

"Unlike traditional tools that focus solely on surface-level email checks, MailTester.Ninja combines advanced email verification with deeper analysis of the technical and reputational signals used by mailbox providers ..."

London Loves Business

Professional Email Verification & Email Finder Tool

At MailTester.Ninja, we are committed to enhancing your communication strategies. Whether you are looking to clean up your existing mailing list, prevent fraud, or comply with GDPR, our email verification tool is tailored to meet your requirements.

  • Embrace the power of a reliable mail tester, email checker, and email finder with MailTester.Ninja unlimited and take your e-marketing campaigns to the next level.
  • Discover new potential contacts and leads with our sophisticated search tools, designed to explore and identify valid contacts that align with your business needs.
  • Our email checker functionality is designed to validate your recipients in real-time, reducing bounce rates and increasing the efficiency of your marketing campaigns.
  • By verifying each recipient address, MailTester.Ninja helps maintain the integrity of your sender reputation, preventing your emails from being flagged as spam.
  • Moreover, as an effective email finder, MailTester.Ninja aids in expanding your outreach.

Ready to Take Your Email Verification to the Next Level?

Our advanced email verifier and email finder solutions will transform how you handle email marketing, ensuring maximum deliverability and campaign success.

Start Now
  • Unlike other tools, we are the only solution on the web that never stores your verified emails on our servers.
  • This guarantees full GDPR compliance.
  • With Mailtester Ninja, verified emails mean a bounce rate of less than 1%.
  • Ensuring your campaigns reach their full potential.

Latest Email Verification Articles & Resources

Stay updated with the latest tips, guides, and best practices for email verification and email marketing

Start Verifying Your Emails Now

Join thousands of users trusting our free email verification tool and email finder.

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